Improvement in water-injectors



UNrTED STATES JHN B. QOLLEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIM- PATENT Ormea..

SELF, A. REX, AND J. T. ROV AND, OF SAMEV PLAGE.

IMPROVEMENT IN WATER-INJECTORS.

Speciliration brniing part of Letters Patent No. 42.044, dated March '22, IE6-'1.

.To all who/1t t mrtg concern:

12e it known that I, JOHN I3. CoLLEN, of Philadelphia, Pennsylvania,` have invented an Improvement in Injectors; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing, and to the letters ol' reference marked thereon.

My improvements, which are fully described hereinafter, have been made with the view of avoiding the difficulties heretofore experienced in starting injectors as usually construeted; also with the view of drawing oil' the water from the instrument when its actionhas ceased.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

The ligure in the accompanying drawing represents a sectional view oi' my improved i njector.

A is a vessel of any convenient form, having at the lower end a branch pipe, (t, and at the upper end a similar branch pipe, I. A tube, B, passes through the vessel A, and is screwed at the upper end to the branch b, and at the lower end to the branch a, the tube communicating with the steam-pipe C, and through openings c with the interior of the vessel A, to which water is admitted through a pipe attached to the branch D. A tapering nozzle, E, is secured to the interior of the tube B, between which and the nozzle intervenes an annular space gradually increasing` in size. A vertical pipe, D, is secured to the branch a, and to the lower end of this pipe is connected the chest F, in which are two chambers, G and H, the former communieating in one direction with the pipe D, in another direction through a passage, m, with the chamber II, which contains a ball or other suitable valve, I, and below the latter a rod, J, the end of which passes through the bottom of the chest F and bears against the same, as seen in the drawing. An ordinary stopeock, K, is screwed in the chest near the bottom of the same, and on the opposite side of the chest Fis a branch,f, which maybe secured directly to the boiler, although in many instances it is necessary for the instrument to be situated at a distance from the boiler, in which ease the branch is attached to a bent pipe, Ii, Athe outer end of which is secured to a check-valve attached to the boiler. Whenever this connecting-pipe is used, I make it of theform, or approximating to the form, shown, so that the valve-chest F may be below the point where the pipe communicates with the chest of the cheek-valve on the boiler. The object of this arrangement, as also of the cock M, will be explained hereinafter.

In the use of ordinary injectors more or less difficulty is experienced in starting the instrument, especially when the water has to'be obtained from a distance, or where the supply of water is at a considerable depth below the instrument. One part of my improvement has been especially designed to obviate this difiiculty.

In starting my injector' I. Ii rst open the cock K and then permit the water to enter the vessel A and the steam to enter the pipe C. The steam and water rush down the pipe D, driving the air through the cock K, through which also passes the steam and water. rIhe pipe D thus becomes charged with the accumulating water, after which the cock E is closed, and the instrument at once commences to operate, discharging the water through the passage m and chamber I-I into the boiler.

I have i'ound in practice that a momentary opening of the cock K suffices to charge the pipe D with water and to insure the proper lstarting of the instrument, even if the water is derived from a distant source. rlhe cock K has the further advantage of allowing the water which remains in the pipe D and valvechest, after the action of the instrument has ceased, to be readily drawn oli, thereby preventing the freezing of the water and injury to the instrument.

It is important that all the water should be discharged hence the use of the rod J, on raising which the valve I is elevated for an instant, thereby permitting the steam to force the water from the chest through the cock K.

When the instrument is situated at a distance from the boiler and connected theretol oook, K, or its equivalent, for the purpose through the medium of the pipe L, whatever specified. walter remains in this pipe after the action of l 2. The combination of the valve-chest T, the instrument ceases will ow down the said with a Valve, I, rod J, and the cock K. pipe, and can be readily drawn off by open- In testimony whereof I have signed my ing the cock M, thus emptying the pipe more naine to this specification in the presence oi' readily than if it Were straight or were bent in I two subscribing Witnesses n contrary direct-ion to that shown. l T

I. claim as my invention and desire to sei JOHN L' COLLED" cure by Letters Patent- Vitn esses:

1. The combination of an injector, con-l JOHN WHITE,

CHARLES HoWsoN.

strneted substantially as described, with a 

